For those who, like me, were expecting Ceredigion: Aberteifi is the town, Ceredigion is the county.
Cardigan is the English name of the town Aberteifi.
The name of the county of Cardigan was Sir Aberteifi
The county Cardiganshire was abolished in 1972 when Dyfed was formed, the latest re-organisation gave birth to the county of Ceredigion in 1996.
Ceredigion used to be called 'Cardiganshire' in English, but it is nowadays just called 'Ceredigion' in both languages. https://www.ceredigion.gov.uk
Shouldn't we use "ddydd" here instead of "dydd"? After reading the skill info page, I have expected "ddydd" when we say "on ...(some day)".
ddydd is better, yes.